Method of operating the draft rollers of spinning mules



April 1, 1924. v 1,489,010

1 R.ROTH

METHOD OF OPERATING THE DRAFT ROLLERS 0F SPINNING MULES File July-6, 1 22 WHHIU Patented Apr. l, 1924.

?ATENT OFFICE.

RENE BOTH, h MULHO'USE' FRANCE, ASSIGNO'B TO SOCIET'E ALSACIENNE DI CON- STEUCTIONS IIIECANTQUES, OF IvTULTTQUSE, HAUT-RHINE, FRANCE.

METHOD OF OEERATING THE DRAIT ROLLERS 0F SPINNING MU'LES.

Application filed July 6,

T 0 all whom it may concern:

Be it known that T, ltnniiltorn, engineer, 23 Rue de Bale, Mulhouse, Habit-Rhine, France, have invented new and useful Tmprovements in Method of @perating the Draft Rollers of Spinning Mules, of which the following is a specification.

The invention relates to spinning mules having a driving shaft rotating at constant m or substantially constant speed and always in the same direction, for example of the kind described in the French Patent No. 514,795 of April 30, 1920.

If the ordinary method of operating the draft rollers is maintainedin these spinning frames, the rollers start too suddenly at the beginning of the first period (since the roller clutch, connected to the driving shaft by a train of gears, rotates at a constant 2) speed), which would not delay in fatiguing unduly the shafts where they are squared for mounting the wheels, and would cause the thread to cut at each stretch.

The object of the present invention is to avoid this rough starting. For this purpose the rollers are given successively a slow speed for a short time at the beginning of the outward run of the carriage and a higher speed afterwards, during the remainder of the outward run. The low speed of the rollers prevents rough starting and, at the same time, ensures a regular tension on the yarn. This latter advantage is particularly important, when an elastic sleeve device is employed for driving the carriage to obtain an easy start of the latter, because for avoiding snarls in the yarn, the speed of the rollers must be low at the beginning of the outward run of the carriage, when, owing to the elastic device, the latter is progressively accelerated. As soon as the carriage is completely under way, the rollers are given the second speed which has a higher rate than the first. The moment at which the change of speed must be efiected will have to be regulated so as to prevent the forming of snarls without however in creasing the pull on the thread. The second speed is the normal speed; it re-establishes the relation which must exist between the development of the front roller and that of the carriage, so as to obtain the draw determined by the draft gear placed on the intermediate transmission between the rollers and the back shaft.

ion G rotating at a constant speed which 1922. Serial No. 573,130.

The annexed drawings represent, as an example only, a form of executing the invention. The drawings are moreover limited to the representation of the parts necessary for understanding the invention.

Figure 1 is an elevation corresponding to the position of the parts in which the rollers are thrown out of mesh (during the backing off and the return of the carriage).

Figure 2 is an elevation corresponding to the position of the parts in which the rollers rotate at the first speed.

Figure 3 is a partial plan of the mechanism which puts the rollers into mesh for the high speed. i y

It is assumed that the rollers and the outward movement of the carriage are operated by a pinion on the driving shaft, by an intermediate back gear; and back change wheel. These operating parts are not shown in the annexed drawings.

The back change wheel is mounted on the shaft A (perpendicular to the plane of F igures 1 and 2), which carries at the other end the bevel pinion B, meshing with the bevel gear C which turns freely on the shaft D connecting the two sides of the front roller in the gearing end but which is rigidly connected to the clutches E, F and the pin depends on the speed of the driving shaft and the ratio of the operating wheels (back change wheel).

In Figure 1, the clutches are out of mesh, which corresponds to the stopping of the rogers (during backing off and winding up The rotation of the rollers at the first slow speed for starting at the beginning of the stretch is caused by a half turn of the shaft H. The cam H, mounted on H, moves the lever T in the direction of the arrow 1 and causes the clutch E to mesh with the movable clutch E (Figure 2). The clutch E, which is loose on the shaft D, is rigidly connected to the pinion J which transmits the movement by the intermediate back gear K L to the gear M which is also loose on the shaft D. The gear M is provided with a pawl N with two stops between which passes the flat spring P pressed on to the ratchet wheel 0 keyed onto the shaft D. By the direction of rotation of the gear M, the spring P causes the pawl N to engage the ratchet 0. In this way the rollers are given no a slow rotary motion the rate of which depends on the ratios of the wheels J, K, L, M.

The lever I having moved the slotted link Q, (from the position represented in Figure 1 to that represented in Figure 2) byits displacement during the half turn of the cam-shaft H, would have permitted the spring it to mesh the clutches F, F by means of the lever S, if the latter were not retained by a stop T (Figures 2 and 3) mounted on'the carriage, which moves it in the direction of the arrow 2 (Figure 8) in relation to the lever S, during the stretch. This step T must in fact retain the lever 3 while the stretch commences, and until by means of its movement in the direction of the arrow 2, the elbow T frees the lever S and permits the meshing of the clutches F, F by the action of the spring The clutch F then transmits its rotary motion to the movable clutch F which drives a cross piece keyed on the shaft D; in this way the rollers are given their second speed which is that of the bevel pinion B.

This speed, which is higher than the first speed, is maintained during the rest of the stretch. The first speed is automatically thrown out of mesh, for the spring .P turning faster than the gear with pawl N, lifts the latter and disengages it from the ratchet Q. The time at which the second speed is thrown into mesh must be adjust" able and may be regulated by the initial position given to the bent stop mounted on the carriage. At the end of the stretch, the cam shaft H makes its half revolution, unmeshes the clutches E E and F F by means of the lever T, the link Q and the lever S, and the rollers are stopped. This position (Figure 1) is maintained during the backing off and the winding up, and the clutches are thrown into mesh again giving the rollers a slow speed at the beginning of the stretch, then thrown into mesh so as to give the rollers a high speed after a certain part of the outward movement of the carriage, and so on.

The arrangementjust describedof a mecha nism carrying out the method forming the object of the invention, has been given only as an example. Any other equivalent arrangement may be applied without ceasing to be included in the invention; the selection of the arrangement depenning in ach case on the type of construction of the spinning mule.

Having now described the invention, what I claim is:

1. In spinning mules, having a driving shaft rotating at constant or substantially constant speed means for operating the rollers to give said rollers successively a slow speed at the beginning of the outward run of the carriage and a higher speed afterwards during the remainder of the outward run, said high speed corresponding to the desired drawing.

2. Means for rotating the draft rollers of spinning mules comprising, in combination with the driving shaft of the said rollers, a first clutch acting so as to drive the shaft by a suitable transmission mechanism at a slow speed; a second clutch for driving the same shaft at a higher speed, a cam shaft acting so as to operate the two clutches, and, in combination with the carriage a stop which prevents temporarily the throwing in of the second clutch until the time at which the rollers must be driven at the higher speed.

3. Means for rotating the draft rollers of spinning mules comprising, in combination with the driving shaft of the said rollers, a first clutch acting so as to drive the shaft at a slow speed, a second clutch for driving the same shaft at a higher speed, a transmission mechanism arranged between the first clutch and the shaft which is to be driven, a ratchet wheel keyed to this shaft, a pawl provided on the transmission mechanism for acting on the said ratchet wheel and driving the shaft at a slow speed, a fiat spring pressed onto theratchet wheel for raising the pawl when the shaft, driven by the second clutch, rotates at a higher speed than that given by the first clutch, a cam shaft for operating the two clutches, and, combined with the carriage, a stop which temporarily prevents throwing in the second clutch until the time at which the rollers must be driven at the higher speed.

4. Means for rotating the draft rollers of spinning mules comprising, in combination with the front roller driving shaft; a first clutch acting so as to drive the shaft at a slow speed, a second speed clutch for driv ing the same shaft at a higher speed, a speed reducing mechanism between the first clutch and the shaft which is to be driven, a ratchet wheel keyed onto this shaft, a pawl provided on the speed reducing mechanism for acting on the ratchet wheel and driving the shaft at the slow speed, a flat spring pressed onto the ratchet wheel for raising the said pawl andrendering the first clutch inactive when the shaft is driven by the second clutch, a constrained spring tending to throw in the second clutch under the action of the cam shaft, a lever acted upon by this spring so as to cause the said clutch to be thrown in, and, adjustably mounted on the carriage, a removable stop temporarily preventing this lever from moving under the action of the said spring and then causing this spring to be stretched by the action of the cam shaft so that the second clutch will be thrown in as soon as the stop is removed.

5. Means for rotating the draft rollers of spinning mules comprising in combination with the roller driving shaft, a first clutch acting so as to drive the shaft at a slow speed, a second clutch for driving the same shaft at a higher speed, a speed reducing mechanism between the first clutch and the shaft which is to be driven, a ratchet wheel keyed onto this shaft, a pawl provided on the speed reducing mechanism for acting on the ratchet wheel and driving the shaftatthe slow speed, a fiat spring pressed onto the ratchet wheel for raising the said pawl and rendering the first clutch unoperative when the shaft is driven by the second clutch a constrained spring tending to throw in the second clutch under the action of the cam shaft, a lever acted upon by this spring so as to cause the said clutch to be thrown in, and adjustably mounted on the carriage, a removable stop temporarily preventing this so that the second clutch will be thrown in as soon as the stop is removed, said stop comprising a bent rod adjustably attached to and moving with the carriage in front of and against this clutch lever so as to form a stop against the said lever and prevent throwing in the clutch as long as the bent portion of the rod is in front of the part which throws in the second clutch.

In witness whereof, I afiix my signature.

RENE ROTH.

Witnesses:

FRANK A. KELLER, WILLIAM G. STONER. 

